Messages in this thread |  | | | Date | Mon, 24 Aug 1998 18:47:09 +0100 | | From | "Stephen C. Tweedie" <> | | Subject | Re: 2.1.xxx makes Electric Fence 22x slower |
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Hi,
On Mon, 24 Aug 1998 10:05:56 -0700 (PDT), Linus Torvalds <torvalds@transmeta.com> said:
> The avl code didn't have any replacement, but was removed because it no > longer mattered for the common case (which was verify_area() - now > thankfully gone).
> I would try a one-entry cache, that's probably fine for all common uses.
Electric Fence is a special case. Since it generates large mms with lots of single-page vmas, a one-entry cache is going to have very little effect; most operations are going to be random insert/delete operations to the chain or single page demand-zeros.
A single-entry cache will certainly help for the common case, but it's not the common case which is the problem.
--Stephen
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